/* 公共样式 */
.nov {
    height: 7%;
    width: 100%;
}

.activenav div {
    color: var(--color-chack-yellow) !important;
}

.activenav>div {
    background: rgba(255, 118, 0, 0.2) !important;
    border: solid 1px darkorange !important;
}

:root {
    --color-chack-yellow: rgb(245, 159, 128);
    --color-word: rgb(75, 213, 209);
    --color-smartword: rgb(81, 88, 106);
    --color-background: rgba(120, 175, 255, 0.18);
    --color-background2: rgba(3, 120, 192, 0.5);
    --color-border: #26baff;
}

.bigtitle {
    font-size: 18px;
    color: var(--color-word);
    padding-top: 7px;
    padding-bottom: 7px;
}

.bigtitle span {
    font-size: 18px;
    margin-left: 10px;
    color: var(--color-smartword);
}

.head .right {
    float: right;
    font-size: 0.8vw;
    color: var(--color-word);
    line-height: 80px;
}

.head::before {
    content: "";
    width: 100%;
    height: 100%;
    background: url("../image/previews.png");
    background-size: 100% 100%;
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    bottom: 0;
}

.head .centernav {
    /* width: 722px; */
    position: absolute;
    left: 50%;
    vertical-align: middle;
    top: 25%;
    transform: translateX(-50%);
}

.centernav>div {
    display: inline-block;
    color: white;
    font-size: 18px;
    text-align: center;
}

.centernav>div>div {
    border: solid 1px var(--border);
    background: var(--color-background);
    color: aqua;
    margin: 0 10px;
    padding: 3px 10px
}

.head {
    height: 94px;
    /* overflow: hidden; */
    position: fixed;
    top: 0;
    width: 100%;
    left: 0;
    padding: 0 20px;
    box-sizing: border-box;
}

.head .logo {
    float: left;
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
}

.head .logo span {
    font-size: 1.4vw;
}

.head .logo span:nth-child(1) {
    color: var(--color-chack-yellow);
}

.head .logo span:nth-child(2) {
    color: var(--color-word);
}

body {
    background: rgb(6, 24, 48);
    margin: 0 auto;
}

.box {
    height: 100vh;
    width: 100%;
    overflow: hidden;
    /* padding-left: 20px;
    padding-right: 20px; */
    box-sizing: border-box;
    position: relative;
    /* padding-top: 10%; */
}

.box::before {
    z-index: 0;
    content: '';

    display: block;

    width: 100%;

    height: 100%;

    position: absolute;

    top: 0;

    right: 0;

    bottom: 0;

    left: 0;
    background: url("https://pic.vjshi.com/2019-08-31/c146f2347bb4dbdb7cbcf25ef61976b0/online/b5f86d7f6b84652308ac2843e1980c80.jpg?x-oss-process=style/resize_w_720");

    opacity: 0.3;

}

:root {
    --color-chack-yellow: rgb(245, 159, 128);
    --color-word: rgb(75, 213, 209);
    --color-smartword: rgb(81, 88, 106);
    --color-background: rgb(120, 175, 255, 0.18);
    --border: #26baff;
}

.content {
    width: 100%;
    height: 93vh;
    z-index: 10;
    box-sizing: border-box;
    padding: 20px;
    padding-top: 9px;
    position: relative;
}

.shaixuan {
    height: 17px;
}

.ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.ul li {
    list-style: none;
    padding: 0;
    margin: 0;

}